Stable chromosome fission associated with rDNA mobility

1995 ◽  
Vol 3 (7) ◽  
pp. 417-422 ◽  
Author(s):  
K. J. Hall ◽  
J. S. Parker
Keyword(s):  
Chromosome Fission

scholarly journals Reconstruction of evolutionary trajectories of coffee chromosomes

2019 ◽  
Author(s):  
Jing Li ◽  
Jiaqing Yuan ◽  
Yuhao Zhao ◽  
Fanbo Meng ◽  
Chao Liu ◽  
...  
Keyword(s):  
Evolutionary Process ◽  
End Joining ◽  
Chromosome Fusion ◽  
Plant Chromosomes ◽  
Evolutionary Trajectories ◽  
Widespread Phenomenon ◽  
Satellite Chromosomes ◽  
Chromosome Fission ◽  
Chromosome Fusions ◽  
Fusion Mode

Abstract Background Polyploidization is a widespread phenomenon in plants, especially in angiosperms. Because of the rearrangement of chromosomes and the loss of genes, the number of plant chromosomes will reduce. Studies have shown that core dicotyledons are derived from ancestors with seven proto-chromosomes, which triplicated in a core-eudicot-common hexaploidization. Therefore, dicotyledon with different chromosome numbers have evolved on the basis of 21 chromosomes. On this basis, we selected grape as the intermediate reference species to infer the karyotype evolutionary process of coffee. Results We found that all the chromosome fusion forms in grape were end-end joining, and 7 (70.0%) chromosome fusion forms in coffee were end-end joining. In the process of grape forming 19 chromosomes, there were three chromosome fusions and one chromosome fission. In the process of coffee 11 chromosomes formation, 10 chromosome fusions occurred. During the process, we inferred that satellite chromosomes formed by telomeres from the same or different chromosomes were produced; and the lost of them resulted in chromosome number reduction Conclusions Notably, we found that the major fusion mode of chromosomes in coffee is end-end joining, which is well explained by telomere-centric model, shared by grape and possibly by many other eudicots. This is contrastively different from the observation of monocot plants like grasses, in which nested chromosome fusions often occurred. The present work will help to understand the structural and functional innovations of plant chromosomes.

Unstable Robertsonian translocations der(13;15)(q10;q10): Heritable chromosome fission without phenotypic effect in two kindreds

2005 ◽  
Vol 136A (1) ◽  
pp. 25-30
Author(s):  
Jo Perry ◽  
Sue M. White ◽  
Sara Nouri ◽  
Sharon M. Bain ◽  
Rhonda G. Hutchinson ◽  
...  
Keyword(s):  
Phenotypic Effect ◽  
Robertsonian Translocations ◽  
Chromosome Fission

scholarly journals Programmed chromosome fission and fusion enable precise large-scale genome rearrangement and assembly

Science ◽  
2019 ◽  
Vol 365 (6456) ◽  
pp. 922-926 ◽  
Author(s):  
Kaihang Wang ◽  
Daniel de la Torre ◽  
Wesley E. Robertson ◽  
Jason W. Chin
Keyword(s):  
Large Scale ◽  
Genome Engineering ◽  
Genome Rearrangement ◽  
Chromosome Fusion ◽  
Single Genome ◽  
Powerful Approach ◽  
Chromosome Fission ◽  
Different Strains ◽  
Genomic Regions ◽  
Genome Manipulation

The design and creation of synthetic genomes provide a powerful approach to understanding and engineering biology. However, it is often limited by the paucity of methods for precise genome manipulation. Here, we demonstrate the programmed fission of the Escherichia coli genome into diverse pairs of synthetic chromosomes and the programmed fusion of synthetic chromosomes to generate genomes with user-defined inversions and translocations. We further combine genome fission, chromosome transplant, and chromosome fusion to assemble genomic regions from different strains into a single genome. Thus, we program the scarless assembly of new genomes with nucleotide precision, a key step in the convergent synthesis of genomes from diverse progenitors. This work provides a set of precise, rapid, large-scale (megabase) genome-engineering operations for creating diverse synthetic genomes.

scholarly journals Chromosome fission associated with growth of ribosomal DNA in Neodiprion abietis (Hymenoptera: Diprionidae)

2000 ◽  
Vol 267 (1455) ◽  
pp. 1819-1823 ◽  
Author(s):  
J. Rousselet ◽  
L. Monti ◽  
M.–A. Auger–Rozenberg ◽  
J. S. Parker ◽  
F. Lemeunier
Keyword(s):  
Ribosomal Dna ◽  
Neodiprion Abietis ◽  
Chromosome Fission

scholarly journals The genome of Leishmania adleri from a mammalian host highlights chromosome fission in Sauroleishmania

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Simone Coughlan ◽  
Peter Mulhair ◽  
Mandy Sanders ◽  
Gabriele Schonian ◽  
James A. Cotton ◽  
...  
Keyword(s):  
Mammalian Host ◽  
Chromosome Fission

Karyotypic diversification and its contribution to the taxonomy of Eleocharis (Cyperaceae) from Brazil

2010 ◽  
Vol 58 (1) ◽  
pp. 49 ◽  
Author(s):  
Carlos Roberto Maximiano da Silva ◽  
Rafael Trevisan ◽  
Maria Socorro González-Elizondo ◽  
Josué Maldonado Ferreira ◽  
André Luís Laforga Vanzela
Keyword(s):  
Chromosome Number ◽  
Chromosome Numbers ◽  
Karyotype Analysis ◽  
Basic Number ◽  
Common Event ◽  
Brazilian Species ◽  
Bivalent Formation ◽  
Chromosome Fission ◽  
Regular Meiosis

A karyotype analysis of 147 populations of 25 Brazilian species of Eleocharis (Cyperaceae) was carried out, including representatives of the three subgenera that occur in the country: Limnochloa, Scirpidium and Eleocharis. The analyses showed chromosomes without centromeres, but with terminal nucleolar constrictions (satellites) in some chromosomes. The chromosome numbers varied from 2n = 6 in E. subarticulata and E. maculosa to 2n = 60 in E. laeviglumis, but the chromosome basic number x = 5 was confirmed. Species of the subgenera Eleocharis and Scirpidium possess fewer and larger chromosomes, while those in the subgenus Limnochloa have small and more numerous chromosomes. These features indicate that the karyotypes of the subgenera Eleocharis and Scirpidium are more closely related, in agreement with morphological and phylogenetical data. The representatives of the section Eleocharis exhibited the largest differences in chromosome number and size, probably due to chromosome fission and fusion. Polyploidy was the most common event in this group. Nevertheless, most of the studied species exhibited regular meiosis with only bivalent formation, even the polyploids, such as in E. geniculata and E. sellowiana. The cytogenetic information obtained showed quite variable karyotypes with chromosomes gradually decreasing in size, and predominance of polyploidy. These results are useful in the differentiation of the subgenera.

scholarly journals Comparative sequence analysis of primate subtelomeres originating from a chromosome fission event

2008 ◽  
Vol 19 (1) ◽  
pp. 33-41 ◽  
Author(s):  
M. K. Rudd ◽  
R. M. Endicott ◽  
C. Friedman ◽  
M. Walker ◽  
J. M. Young ◽  
...  
Keyword(s):  
Sequence Analysis ◽  
Comparative Sequence Analysis ◽  
Fission Event ◽  
Comparative Sequence ◽  
Chromosome Fission
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